Andrew's git / gitweb.git / cache.h
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cache.hon commit Remove unused object-ref code (7914053)
   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5#include "strbuf.h"
   6
   7#include SHA1_HEADER
   8#include <zlib.h>
   9
  10#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  11#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  12#endif
  13
  14#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  15#define DTYPE(de)       ((de)->d_type)
  16#else
  17#undef DT_UNKNOWN
  18#undef DT_DIR
  19#undef DT_REG
  20#undef DT_LNK
  21#define DT_UNKNOWN      0
  22#define DT_DIR          1
  23#define DT_REG          2
  24#define DT_LNK          3
  25#define DTYPE(de)       DT_UNKNOWN
  26#endif
  27
  28/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  29#define S_IFINVALID     0030000
  30
  31/*
  32 * A "directory link" is a link to another git directory.
  33 *
  34 * The value 0160000 is not normally a valid mode, and
  35 * also just happens to be S_IFDIR + S_IFLNK
  36 *
  37 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  38 * always having the same values everywhere. We should use
  39 * our internal git values for these things, and then we can
  40 * translate that to the OS-specific value. It just so
  41 * happens that everybody shares the same bit representation
  42 * in the UNIX world (and apparently wider too..)
  43 */
  44#define S_IFGITLINK     0160000
  45#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  46
  47/*
  48 * Intensive research over the course of many years has shown that
  49 * port 9418 is totally unused by anything else. Or
  50 *
  51 *      Your search - "port 9418" - did not match any documents.
  52 *
  53 * as www.google.com puts it.
  54 *
  55 * This port has been properly assigned for git use by IANA:
  56 * git (Assigned-9418) [I06-050728-0001].
  57 *
  58 *      git  9418/tcp   git pack transfer service
  59 *      git  9418/udp   git pack transfer service
  60 *
  61 * with Linus Torvalds <torvalds@osdl.org> as the point of
  62 * contact. September 2005.
  63 *
  64 * See http://www.iana.org/assignments/port-numbers
  65 */
  66#define DEFAULT_GIT_PORT 9418
  67
  68/*
  69 * Basic data structures for the directory cache
  70 */
  71
  72#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  73struct cache_header {
  74        unsigned int hdr_signature;
  75        unsigned int hdr_version;
  76        unsigned int hdr_entries;
  77};
  78
  79/*
  80 * The "cache_time" is just the low 32 bits of the
  81 * time. It doesn't matter if it overflows - we only
  82 * check it for equality in the 32 bits we save.
  83 */
  84struct cache_time {
  85        unsigned int sec;
  86        unsigned int nsec;
  87};
  88
  89/*
  90 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  91 * Again - this is just a (very strong in practice) heuristic that
  92 * the inode hasn't changed.
  93 *
  94 * We save the fields in big-endian order to allow using the
  95 * index file over NFS transparently.
  96 */
  97struct cache_entry {
  98        struct cache_time ce_ctime;
  99        struct cache_time ce_mtime;
 100        unsigned int ce_dev;
 101        unsigned int ce_ino;
 102        unsigned int ce_mode;
 103        unsigned int ce_uid;
 104        unsigned int ce_gid;
 105        unsigned int ce_size;
 106        unsigned char sha1[20];
 107        unsigned short ce_flags;
 108        char name[FLEX_ARRAY]; /* more */
 109};
 110
 111#define CE_NAMEMASK  (0x0fff)
 112#define CE_STAGEMASK (0x3000)
 113#define CE_UPDATE    (0x4000)
 114#define CE_VALID     (0x8000)
 115#define CE_STAGESHIFT 12
 116
 117#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
 118#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
 119#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 120#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
 121
 122#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 123static inline unsigned int create_ce_mode(unsigned int mode)
 124{
 125        if (S_ISLNK(mode))
 126                return htonl(S_IFLNK);
 127        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 128                return htonl(S_IFGITLINK);
 129        return htonl(S_IFREG | ce_permissions(mode));
 130}
 131static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 132{
 133        extern int trust_executable_bit, has_symlinks;
 134        if (!has_symlinks && S_ISREG(mode) &&
 135            ce && S_ISLNK(ntohl(ce->ce_mode)))
 136                return ce->ce_mode;
 137        if (!trust_executable_bit && S_ISREG(mode)) {
 138                if (ce && S_ISREG(ntohl(ce->ce_mode)))
 139                        return ce->ce_mode;
 140                return create_ce_mode(0666);
 141        }
 142        return create_ce_mode(mode);
 143}
 144#define canon_mode(mode) \
 145        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 146        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 147
 148#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 149
 150struct index_state {
 151        struct cache_entry **cache;
 152        unsigned int cache_nr, cache_alloc, cache_changed;
 153        struct cache_tree *cache_tree;
 154        time_t timestamp;
 155        void *mmap;
 156        size_t mmap_size;
 157};
 158
 159extern struct index_state the_index;
 160
 161#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 162#define active_cache (the_index.cache)
 163#define active_nr (the_index.cache_nr)
 164#define active_alloc (the_index.cache_alloc)
 165#define active_cache_changed (the_index.cache_changed)
 166#define active_cache_tree (the_index.cache_tree)
 167
 168#define read_cache() read_index(&the_index)
 169#define read_cache_from(path) read_index_from(&the_index, (path))
 170#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 171#define discard_cache() discard_index(&the_index)
 172#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 173#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 174#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 175#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 176#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
 177#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
 178#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 179#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 180#endif
 181
 182enum object_type {
 183        OBJ_BAD = -1,
 184        OBJ_NONE = 0,
 185        OBJ_COMMIT = 1,
 186        OBJ_TREE = 2,
 187        OBJ_BLOB = 3,
 188        OBJ_TAG = 4,
 189        /* 5 for future expansion */
 190        OBJ_OFS_DELTA = 6,
 191        OBJ_REF_DELTA = 7,
 192        OBJ_ANY,
 193        OBJ_MAX,
 194};
 195
 196static inline enum object_type object_type(unsigned int mode)
 197{
 198        return S_ISDIR(mode) ? OBJ_TREE :
 199                S_ISGITLINK(mode) ? OBJ_COMMIT :
 200                OBJ_BLOB;
 201}
 202
 203#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 204#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 205#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 206#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 207#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 208#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 209#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 210#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 211#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
 212#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 213#define GITATTRIBUTES_FILE ".gitattributes"
 214#define INFOATTRIBUTES_FILE "info/attributes"
 215#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 216
 217extern int is_bare_repository_cfg;
 218extern int is_bare_repository(void);
 219extern int is_inside_git_dir(void);
 220extern char *git_work_tree_cfg;
 221extern int is_inside_work_tree(void);
 222extern const char *get_git_dir(void);
 223extern char *get_object_directory(void);
 224extern char *get_refs_directory(void);
 225extern char *get_index_file(void);
 226extern char *get_graft_file(void);
 227extern int set_git_dir(const char *path);
 228extern const char *get_git_work_tree(void);
 229
 230#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 231
 232extern const char **get_pathspec(const char *prefix, const char **pathspec);
 233extern void setup_work_tree(void);
 234extern const char *setup_git_directory_gently(int *);
 235extern const char *setup_git_directory(void);
 236extern const char *prefix_path(const char *prefix, int len, const char *path);
 237extern const char *prefix_filename(const char *prefix, int len, const char *path);
 238extern void verify_filename(const char *prefix, const char *name);
 239extern void verify_non_filename(const char *prefix, const char *name);
 240
 241#define alloc_nr(x) (((x)+16)*3/2)
 242
 243/*
 244 * Realloc the buffer pointed at by variable 'x' so that it can hold
 245 * at least 'nr' entries; the number of entries currently allocated
 246 * is 'alloc', using the standard growing factor alloc_nr() macro.
 247 *
 248 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 249 */
 250#define ALLOC_GROW(x, nr, alloc) \
 251        do { \
 252                if ((nr) > alloc) { \
 253                        if (alloc_nr(alloc) < (nr)) \
 254                                alloc = (nr); \
 255                        else \
 256                                alloc = alloc_nr(alloc); \
 257                        x = xrealloc((x), alloc * sizeof(*(x))); \
 258                } \
 259        } while(0)
 260
 261/* Initialize and use the cache information */
 262extern int read_index(struct index_state *);
 263extern int read_index_from(struct index_state *, const char *path);
 264extern int write_index(struct index_state *, int newfd);
 265extern int discard_index(struct index_state *);
 266extern int verify_path(const char *path);
 267extern int index_name_pos(struct index_state *, const char *name, int namelen);
 268#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 269#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 270#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 271#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 272extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 273extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 274extern int remove_index_entry_at(struct index_state *, int pos);
 275extern int remove_file_from_index(struct index_state *, const char *path);
 276extern int add_file_to_index(struct index_state *, const char *path, int verbose);
 277extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 278extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 279
 280/* do stat comparison even if CE_VALID is true */
 281#define CE_MATCH_IGNORE_VALID           01
 282/* do not check the contents but report dirty on racily-clean entries */
 283#define CE_MATCH_RACY_IS_DIRTY  02
 284extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 285extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 286
 287extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 288extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 289extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 290extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 291extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 292
 293#define REFRESH_REALLY          0x0001  /* ignore_valid */
 294#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 295#define REFRESH_QUIET           0x0004  /* be quiet about it */
 296#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 297extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
 298
 299struct lock_file {
 300        struct lock_file *next;
 301        int fd;
 302        pid_t owner;
 303        char on_list;
 304        char filename[PATH_MAX];
 305};
 306extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 307extern int commit_lock_file(struct lock_file *);
 308
 309extern int hold_locked_index(struct lock_file *, int);
 310extern int commit_locked_index(struct lock_file *);
 311extern void set_alternate_index_output(const char *);
 312extern int close_lock_file(struct lock_file *);
 313extern void rollback_lock_file(struct lock_file *);
 314extern int delete_ref(const char *, const unsigned char *sha1);
 315
 316/* Environment bits from configuration mechanism */
 317extern int trust_executable_bit;
 318extern int quote_path_fully;
 319extern int has_symlinks;
 320extern int assume_unchanged;
 321extern int prefer_symlink_refs;
 322extern int log_all_ref_updates;
 323extern int warn_ambiguous_refs;
 324extern int shared_repository;
 325extern const char *apply_default_whitespace;
 326extern int zlib_compression_level;
 327extern int core_compression_level;
 328extern int core_compression_seen;
 329extern size_t packed_git_window_size;
 330extern size_t packed_git_limit;
 331extern size_t delta_base_cache_limit;
 332extern int auto_crlf;
 333
 334#define GIT_REPO_VERSION 0
 335extern int repository_format_version;
 336extern int check_repository_format(void);
 337
 338#define MTIME_CHANGED   0x0001
 339#define CTIME_CHANGED   0x0002
 340#define OWNER_CHANGED   0x0004
 341#define MODE_CHANGED    0x0008
 342#define INODE_CHANGED   0x0010
 343#define DATA_CHANGED    0x0020
 344#define TYPE_CHANGED    0x0040
 345
 346/* Return a statically allocated filename matching the sha1 signature */
 347extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 348extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 349extern char *sha1_file_name(const unsigned char *sha1);
 350extern char *sha1_pack_name(const unsigned char *sha1);
 351extern char *sha1_pack_index_name(const unsigned char *sha1);
 352extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 353extern const unsigned char null_sha1[20];
 354static inline int is_null_sha1(const unsigned char *sha1)
 355{
 356        return !memcmp(sha1, null_sha1, 20);
 357}
 358static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 359{
 360        return memcmp(sha1, sha2, 20);
 361}
 362static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 363{
 364        memcpy(sha_dst, sha_src, 20);
 365}
 366static inline void hashclr(unsigned char *hash)
 367{
 368        memset(hash, 0, 20);
 369}
 370
 371int git_mkstemp(char *path, size_t n, const char *template);
 372
 373enum sharedrepo {
 374        PERM_UMASK = 0,
 375        PERM_GROUP,
 376        PERM_EVERYBODY
 377};
 378int git_config_perm(const char *var, const char *value);
 379int adjust_shared_perm(const char *path);
 380int safe_create_leading_directories(char *path);
 381char *enter_repo(char *path, int strict);
 382static inline int is_absolute_path(const char *path)
 383{
 384        return path[0] == '/';
 385}
 386const char *make_absolute_path(const char *path);
 387
 388/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 389extern int sha1_object_info(const unsigned char *, unsigned long *);
 390extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
 391extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 392extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 393extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 394
 395extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 396
 397extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 398                              size_t bufsize, size_t *bufposn);
 399extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 400extern int move_temp_to_file(const char *tmpfile, const char *filename);
 401
 402extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 403extern int has_sha1_file(const unsigned char *sha1);
 404
 405extern int has_pack_file(const unsigned char *sha1);
 406extern int has_pack_index(const unsigned char *sha1);
 407
 408extern const signed char hexval_table[256];
 409static inline unsigned int hexval(unsigned char c)
 410{
 411        return hexval_table[c];
 412}
 413
 414/* Convert to/from hex/sha1 representation */
 415#define MINIMUM_ABBREV 4
 416#define DEFAULT_ABBREV 7
 417
 418extern int get_sha1(const char *str, unsigned char *sha1);
 419extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
 420extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 421extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 422extern int read_ref(const char *filename, unsigned char *sha1);
 423extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 424extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 425extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 426
 427extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 428extern const char *ref_rev_parse_rules[];
 429extern const char *ref_fetch_rules[];
 430
 431extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 432extern int validate_headref(const char *ref);
 433
 434extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 435extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 436
 437extern void *read_object_with_reference(const unsigned char *sha1,
 438                                        const char *required_type,
 439                                        unsigned long *size,
 440                                        unsigned char *sha1_ret);
 441
 442enum date_mode {
 443        DATE_NORMAL = 0,
 444        DATE_RELATIVE,
 445        DATE_SHORT,
 446        DATE_LOCAL,
 447        DATE_ISO8601,
 448        DATE_RFC2822
 449};
 450
 451const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 452int parse_date(const char *date, char *buf, int bufsize);
 453void datestamp(char *buf, int bufsize);
 454unsigned long approxidate(const char *);
 455enum date_mode parse_date_format(const char *format);
 456
 457#define IDENT_WARN_ON_NO_NAME  1
 458#define IDENT_ERROR_ON_NO_NAME 2
 459#define IDENT_NO_DATE          4
 460extern const char *git_author_info(int);
 461extern const char *git_committer_info(int);
 462extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 463extern const char *fmt_name(const char *name, const char *email);
 464
 465struct checkout {
 466        const char *base_dir;
 467        int base_dir_len;
 468        unsigned force:1,
 469                 quiet:1,
 470                 not_new:1,
 471                 refresh_cache:1;
 472};
 473
 474extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 475extern int has_symlink_leading_path(const char *name, char *last_symlink);
 476
 477extern struct alternate_object_database {
 478        struct alternate_object_database *next;
 479        char *name;
 480        char base[FLEX_ARRAY]; /* more */
 481} *alt_odb_list;
 482extern void prepare_alt_odb(void);
 483
 484struct pack_window {
 485        struct pack_window *next;
 486        unsigned char *base;
 487        off_t offset;
 488        size_t len;
 489        unsigned int last_used;
 490        unsigned int inuse_cnt;
 491};
 492
 493extern struct packed_git {
 494        struct packed_git *next;
 495        struct pack_window *windows;
 496        off_t pack_size;
 497        const void *index_data;
 498        size_t index_size;
 499        uint32_t num_objects;
 500        int index_version;
 501        time_t mtime;
 502        int pack_fd;
 503        int pack_local;
 504        unsigned char sha1[20];
 505        /* something like ".git/objects/pack/xxxxx.pack" */
 506        char pack_name[FLEX_ARRAY]; /* more */
 507} *packed_git;
 508
 509struct pack_entry {
 510        off_t offset;
 511        unsigned char sha1[20];
 512        struct packed_git *p;
 513};
 514
 515struct ref {
 516        struct ref *next;
 517        unsigned char old_sha1[20];
 518        unsigned char new_sha1[20];
 519        unsigned int force:1,
 520                merge:1,
 521                nonfastforward:1,
 522                deletion:1;
 523        enum {
 524                REF_STATUS_NONE = 0,
 525                REF_STATUS_OK,
 526                REF_STATUS_REJECT_NONFASTFORWARD,
 527                REF_STATUS_REJECT_NODELETE,
 528                REF_STATUS_UPTODATE,
 529                REF_STATUS_REMOTE_REJECT,
 530                REF_STATUS_EXPECTING_REPORT,
 531        } status;
 532        char *remote_status;
 533        struct ref *peer_ref; /* when renaming */
 534        char name[FLEX_ARRAY]; /* more */
 535};
 536
 537#define REF_NORMAL      (1u << 0)
 538#define REF_HEADS       (1u << 1)
 539#define REF_TAGS        (1u << 2)
 540
 541extern struct ref *find_ref_by_name(struct ref *list, const char *name);
 542
 543#define CONNECT_VERBOSE       (1u << 0)
 544extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 545extern int finish_connect(struct child_process *conn);
 546extern int path_match(const char *path, int nr, char **match);
 547extern int get_ack(int fd, unsigned char *result_sha1);
 548extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
 549extern int server_supports(const char *feature);
 550
 551extern struct packed_git *parse_pack_index(unsigned char *sha1);
 552extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 553                                                const char *idx_path);
 554
 555extern void prepare_packed_git(void);
 556extern void reprepare_packed_git(void);
 557extern void install_packed_git(struct packed_git *pack);
 558
 559extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 560                                         struct packed_git *packs);
 561
 562extern void pack_report(void);
 563extern int open_pack_index(struct packed_git *);
 564extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 565extern void close_pack_windows(struct packed_git *);
 566extern void unuse_pack(struct pack_window **);
 567extern struct packed_git *add_packed_git(const char *, int, int);
 568extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 569extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 570extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 571extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 572extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 573extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 574extern int matches_pack_name(struct packed_git *p, const char *name);
 575
 576/* Dumb servers support */
 577extern int update_server_info(int);
 578
 579typedef int (*config_fn_t)(const char *, const char *);
 580extern int git_default_config(const char *, const char *);
 581extern int git_config_from_file(config_fn_t fn, const char *);
 582extern int git_config(config_fn_t fn);
 583extern int git_parse_long(const char *, long *);
 584extern int git_parse_ulong(const char *, unsigned long *);
 585extern int git_config_int(const char *, const char *);
 586extern unsigned long git_config_ulong(const char *, const char *);
 587extern int git_config_bool(const char *, const char *);
 588extern int git_config_string(const char **, const char *, const char *);
 589extern int git_config_set(const char *, const char *);
 590extern int git_config_set_multivar(const char *, const char *, const char *, int);
 591extern int git_config_rename_section(const char *, const char *);
 592extern const char *git_etc_gitconfig(void);
 593extern int check_repository_format_version(const char *var, const char *value);
 594extern int config_error_nonbool(const char *);
 595
 596#define MAX_GITNAME (1000)
 597extern char git_default_email[MAX_GITNAME];
 598extern char git_default_name[MAX_GITNAME];
 599
 600extern const char *git_commit_encoding;
 601extern const char *git_log_output_encoding;
 602
 603/* IO helper functions */
 604extern void maybe_flush_or_die(FILE *, const char *);
 605extern int copy_fd(int ifd, int ofd);
 606extern int read_in_full(int fd, void *buf, size_t count);
 607extern int write_in_full(int fd, const void *buf, size_t count);
 608extern void write_or_die(int fd, const void *buf, size_t count);
 609extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
 610extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
 611
 612/* pager.c */
 613extern void setup_pager(void);
 614extern const char *pager_program;
 615extern int pager_in_use(void);
 616extern int pager_use_color;
 617
 618extern const char *editor_program;
 619extern const char *excludes_file;
 620
 621/* base85 */
 622int decode_85(char *dst, const char *line, int linelen);
 623void encode_85(char *buf, const unsigned char *data, int bytes);
 624
 625/* alloc.c */
 626extern void *alloc_blob_node(void);
 627extern void *alloc_tree_node(void);
 628extern void *alloc_commit_node(void);
 629extern void *alloc_tag_node(void);
 630extern void *alloc_object_node(void);
 631extern void alloc_report(void);
 632
 633/* trace.c */
 634extern void trace_printf(const char *format, ...);
 635extern void trace_argv_printf(const char **argv, const char *format, ...);
 636
 637/* convert.c */
 638/* returns 1 if *dst was used */
 639extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
 640extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
 641
 642/* add */
 643void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
 644
 645/* diff.c */
 646extern int diff_auto_refresh_index;
 647
 648/* match-trees.c */
 649void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
 650
 651/*
 652 * whitespace rules.
 653 * used by both diff and apply
 654 */
 655#define WS_TRAILING_SPACE       01
 656#define WS_SPACE_BEFORE_TAB     02
 657#define WS_INDENT_WITH_NON_TAB  04
 658#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
 659extern unsigned whitespace_rule_cfg;
 660extern unsigned whitespace_rule(const char *);
 661extern unsigned parse_whitespace_rule(const char *);
 662extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
 663    FILE *stream, const char *set,
 664    const char *reset, const char *ws);
 665extern char *whitespace_error_string(unsigned ws);
 666
 667/* ls-files */
 668int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
 669int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
 670void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 671
 672#endif /* CACHE_H */